I have bought alot of bluetooth headsets. When I purchased a Plantronics 2 years ago, I loved it. The sound quality was great. Then my husband used it one day and that was the last time I saw it. So I bought another bluetooth headset and it was trouble from day one. I tossed it when I saw the Plantronics Voyager Pro bluetooth headset. I was skeptical at first because of the piece that goes behind your ear and I wear glasses so I did not think it would work. Was I ever wrong! It is so comfortable. It doesn't interfere with my glasses at all. And it feels so much more secure in my ear. From the headset you can turn it off/on, volume up/down, check your battery level, mute, last number redial, end the call, and voice dialing. The mic boom swivels up when you're not using it. It comes with different kinds of ear tips so that you can choose what feels best in your ear. It lists a talk time of 6 hrs and a standby time of 5 days. It doesn't take long to charge. It comes with a wall charger. Most important though is the sound quality. It is amazing. I can hear better than ever and my caller can hear me with no problems. I've even had it out on some very windy days and not had any interruptions in sound. My mom can't even tell when I call her on my cell phone because she said it sounds as good or better than a landline phone now. I am loving the Plantronics Voyager Pro and haven't found anything as a con yet.